Describe what you remember — a scene, a feeling, a character — and I'll help you find it.
Finding your forgotten book is as easy as describing what you remember
Tell us what you remember — a plot twist, a character's name, a scene that stuck with you, or even just a feeling.
Our AI analyzes your description and searches through millions of books to find potential matches.
Get a curated list of books that match your description, complete with covers and links to learn more.
Est. 2026 · Daily No. 2026-05-30
Six clues. One book. The next page turns at midnight.
Today's challenge ✦ Plot + Cover
A fresh plot snippet, or a cover that unveils tile by tile. Pick a mode, take your shot, and come back tomorrow.
Books other readers have been searching for
Here's how other readers have described books they were looking for
✦ Every forgotten book has a story waiting to be remembered ✦
Other ways to track down what you're reading
Describe a scene, a character, a feeling. Get the title.
Open →Genre identifierPaste a description or title. See the primary genre and subgenres.
Open →Similar readsIf you loved a book, here's what to read next.
Open →Curated listsHand-picked reading lists on subjects worth getting right.
Open →Every reader is welcome. Pick the experience that fits your journey.
For the casual book lover
No account needed
For the devoted reader
Your personal book companion
The free plan is here to stay. We'll always help you find your forgotten books at no cost.
Ex Libris
The archive
Free readers get the last 7 days. Members get every plot and cover puzzle we've ever published. Browse back, pick a date, finish the ones you missed.
The weekend
Each weekend we send Members a themed quiz, built from books in your reading orbit. One author, one decade, one genre. In your inbox by Saturday morning.
The search
Members get our web-grounded lane. It looks beyond the catalog and finds books from the foggy half-memories the fast lane gives up on.
The quiet
The site stays quiet. No display ads on result pages, on the archive, or anywhere else you read.
Ask the librarian
Yes. From your Account page, two clicks opens the Stripe billing portal and you can stop renewal right there. You'll keep Member access until the end of the period you've already paid for.
$5 USD per month, or $50 USD per year (that's two months free). Both options run through Stripe. Switch between them anytime from the billing portal.
No. The daily plot and cover puzzles are free for everyone, and so is the last 7 days of the archive. Membership opens up everything older than that, plus the Saturday mega-quiz and the rest of what's listed above.
Your streak history stays. You can keep playing the daily puzzles for free after cancelling. You lose access to the full archive, the Saturday mega-quiz, and deeper AI search, and you'll see ads again.
Yes. We're working on saved reading lists, personalized recommendations, and a reading-history export. Members get all of these automatically as they ship, at the same price. No upgrade or new tier.
Stripe handles all of it. Your card never touches our servers. To update your card or download invoices, use the billing portal from your Account page.
Yes. Email justin@whatisthatbook.com within 14 days of your first charge, monthly or annual, and we'll refund you in full. No questions asked. Full details on the refund policy page.